If the hypothesis is correct, our analysis of K meson transitions,  shows that strange members of the two nonets associated to \(X(3872)\)  and \(Z_c(3900)\)  should both appear in the final states of (REF ), i.e. the \(D_s\bar{D}^{*0} + c.c.\)  spectrum should include as well the \(Z_{cs}(4003)\)  recently observed by LHCb in \(B^+\)  decay [1]} (the classification of the newly discovered \(Z_{cs}\)  resonances is considered in [2]}). This is a crucial feature that can be tested in higher luminosity experiments.
